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- # [postcss][postcss]-unique-selectors
-
- > Ensure CSS selectors are unique.
-
- ## Install
-
- With [npm](https://npmjs.org/package/postcss-unique-selectors) do:
-
- ```
- npm install postcss-unique-selectors --save
- ```
-
- ## Example
-
- Selectors are sorted naturally, and deduplicated:
-
- ### Input
-
- ```css
- h1,h3,h2,h1 {
- color: red
- }
- ```
-
- ### Output
-
- ```css
- h1,h2,h3 {
- color: red
- }
- ```
-
- ## Usage
-
- See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
- examples for your environment.
-
- ## Contributors
-
- See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
-
- ## License
-
- MIT © [Ben Briggs](http://beneb.info)
-
- [postcss]: https://github.com/postcss/postcss
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